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The gauge offers two under voltage protection features - CUV and CUVC. The intent is to use one or the other, but not both in operation. If the cell should not be discharged below 2.5V to prevent damage to the cell, then we set the CUV threshold to 2500mV. The CUVC protections feature offers the same protection, but it removes the drop across the series resistance. You still do not want the internal "storage voltage" of the battery to drop below 2.5V, so the CUVC threshold is set to this minimum voltage minus to voltage drop across the series resistance. So, assuming that the drop across the series resistance is 100mV and CUVC is set to 2400mV, the cell voltage can drop to 2400mV. A fault will not occur until the internal "storage voltage" drops below 2.5V. (2400mV CUVC threshold) The CUVC protection feature may be more useful with pulsed loads or high current applications.
